I wouldn't advocate the use of kettle elements unless you're competant (and confident) in fitting them and using them. They *should* be perfectly safe, but you need to make sure you get a big enough boiler to prevent boilovers as you don't want liquids running onto an unprotected connection. I personally don't really see any risk with using kettle elements as I do myself in my HLT, but if your father is very concerned you could always buy the "official" homebrew elements. They're just a bit more expensive (although I do think better suited to a boiler as the elements are spaced out more and therefore easier to clean).
As for it being 2nd rate, well I think you'll find many (if not most) of those on here use electric element based boilers. They are the most practical and efficient generally for UK homebrewers (not the case in the US so much as the 110v supply means that it's a lot harder to achieve the same wattage on a typical domestic circuit, plus gas is cheaper in the US) plus electric based equipment is quite cheap. It's not controllable in the same way as gas and with a dedicated burner, gas is probably the more powerful option, but you're talking quite a bit of money then.
If it's any help, I had big reservations about using electric (I too wanted to keep it a hob-top setup), but in the end I've discovered no pitfalls to date (touchwood) plus the bills are cheaper.
